1381868085 has 64 divisors (see below), whose sum is σ = 2430425088. Its totient is φ = 666365184.

The previous prime is 1381868071. The next prime is 1381868149. The reversal of 1381868085 is 5808681831.

It is not a de Polignac number, because 1381868085 - 2⁶ = 1381868021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2148774 + ... + 2149416.

It is an arithmetic number, because the mean of its divisors is an integer number (37975392).

Almost surely, 2^1381868085 is an apocalyptic number.

1381868085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381868085 is a deficient number, since it is larger than the sum of its proper divisors (1048557003).

1381868085 is a wasteful number, since it uses less digits than its factorization.

1381868085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 368640, while the sum is 48.

The square root of 1381868085 is about 37173.4863175355. The cubic root of 1381868085 is about 1113.8384238024.

The spelling of 1381868085 in words is "one billion, three hundred eighty-one million, eight hundred sixty-eight thousand, eighty-five".